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h5i
Build and formally verify web apps with Rust and Lean 4
h5i is a Rust web framework built on Axum that brings formal verification with Lean 4 into everyday web development, alongside integrated red-teaming and CI/CD tools. It's designed for Rust developers and teams building AI-generated or security-critical applications. As AI makes coding faster, ensuring correctness becomes increasingly important. h5i helps developers prove critical properties and discover vulnerabilities that traditional testing alone might miss.
I built h5i because AI is making software development faster than ever, but ensuring that the generated code is correct and secure remains a major challenge. Unit tests and security testing can uncover bugs, but they can't guarantee that critical properties always hold.
As a security researcher, I've discovered many vulnerabilities in real-world software, and I've become convinced that formal verification needs to be much more accessible to everyday developers.
That's why I started building h5i, an open-source Rust web framework that makes formal verification with Lean 4 part of the development workflow.
I'd especially love feedback on:
How intuitive is the Rust-to-Lean 4 verification workflow?
What are the biggest barriers to adopting formal verification in your projects?
What would make you consider using h5i for a real-world application?
I'd love to hear from Rust developers, security engineers, and anyone building software with AI coding agents!
About h5i on Product Hunt
“Build and formally verify web apps with Rust and Lean 4”
h5i was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #232 on the daily leaderboard. h5i is a Rust web framework built on Axum that brings formal verification with Lean 4 into everyday web development, alongside integrated red-teaming and CI/CD tools. It's designed for Rust developers and teams building AI-generated or security-critical applications. As AI makes coding faster, ensuring correctness becomes increasingly important. h5i helps developers prove critical properties and discover vulnerabilities that traditional testing alone might miss.
On the analytics side, h5i competes within Open Source, Software Engineering and Developer Tools — topics that collectively have 634.6k followers on Product Hunt. The dashboard above tracks how h5i performed against the three products that launched closest to it on the same day.
Who hunted h5i?
h5i was hunted by Koukyosyumei. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of h5i including community comment highlights and product details, visit the product overview.
Koukyosyumei
I built h5i because AI is making software development faster than ever, but ensuring that the generated code is correct and secure remains a major challenge. Unit tests and security testing can uncover bugs, but they can't guarantee that critical properties always hold.
As a security researcher, I've discovered many vulnerabilities in real-world software, and I've become convinced that formal verification needs to be much more accessible to everyday developers.
That's why I started building h5i, an open-source Rust web framework that makes formal verification with Lean 4 part of the development workflow.
I'd especially love feedback on:
How intuitive is the Rust-to-Lean 4 verification workflow?
What are the biggest barriers to adopting formal verification in your projects?
What would make you consider using h5i for a real-world application?
I'd love to hear from Rust developers, security engineers, and anyone building software with AI coding agents!